Because of the natural tanning and dying process of our vegetable tanned leather, this piece is one of a kind. Variations in grain, texture, color and markings are what makes this leather and each Sylvan Park piece unique. Daily use, exposure to the sun, and the oils from your skin will change the color and finish of your vegetable tanned leather piece; developing what is known as its patina. All Sylvan Park pieces are designed to embrace, and be enhanced, by this change.